干旱区生态环境知识资源中心(Arid): Diverse soil respiration responses to extreme precipitation patterns in arid and semiarid ecosystems

Arid

DOI	10.1016/j.apsoil.2021.103928
	Diverse soil respiration responses to extreme precipitation patterns in arid and semiarid ecosystems
	Zhao, Man; Guo, Shengli; Wang, Rui
通讯作者	Wang, R (corresponding author), Inst Soil & Water Conservat, Xinong Rd 26, Yangling 712100, Shaanxi, Peoples R China.
来源期刊	APPLIED SOIL ECOLOGY
ISSN	0929-1393
EISSN	1873-0272
出版年	2021
卷号	163
英文摘要	Projected increases in the frequency and magnitude of extreme precipitation profoundly impact terrestrial ecosystems. However, the response of soil respiration to changing precipitation patterns has not been systematically investigated, especially in arid and semi-arid areas. Precipitation amounts of 300 and 600 mm (T300 and T600) were set to simulate normal and extremely wet summers, respectively, and were individually conducted by wetting soils in a series of sub-events?10 or 100 mm (P10, P100)?over equal time intervals. Maize straw (1300 kg ha-1) and N fertilization (200 kg N ha-1) were applied in parallel to extend our simulation to natural cropland conditions. Soil respiration pulses were observed after T300-P100, and inhibited effects occasionally occurred 1 day after T600-P100, primarily because frequent and harsh storms in T600-P100 induced saturation stress on soil respiration. Cumulative soil respiration in T600 was greater than that in T300, owing to prolonged suitable water conditions for soil respiration. Similarly, for the same total precipitation amount, P100 produced 40?44% more soil respiration than P10. Applying N and maize straw did not change response trends but produced different magnitudes of response to changing precipitation patterns. Maize straw significantly stimulated soil respiration, and this effect became more evident in P100 with improved water conditions, producing a 122?185% increase in cumulative soil respiration. Nitrogen slightly inhibited soil respiration; this effect was enhanced when maize straw was also added but was insignificant. Cumulative soil respiration was significantly correlated with ?-Dglucosidase and soil microbial biomass carbon content. Such soil respiration responses highlight the need to accurately account for soil respiration contributions when projecting global carbon cycling in future climate scenarios.
英文关键词	Extreme precipitation patterns Soil respiration Water stress N and maize straw
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000647783900018
WOS关键词	WATER-USE EFFICIENCY ; LOESS PLATEAU ; MICROBIAL COMMUNITIES ; HETEROTROPHIC RESPIRATION ; CROP RESIDUE ; CARBON ; PULSES ; RAINFALL ; DESERT ; CHINA
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349511
作者单位	[Zhao, Man; Guo, Shengli; Wang, Rui] Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; [Guo, Shengli; Wang, Rui] Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Man,Guo, Shengli,Wang, Rui. Diverse soil respiration responses to extreme precipitation patterns in arid and semiarid ecosystems[J]. 西北农林科技大学,2021,163.
APA	Zhao, Man,Guo, Shengli,&Wang, Rui.(2021).Diverse soil respiration responses to extreme precipitation patterns in arid and semiarid ecosystems.APPLIED SOIL ECOLOGY,163.
MLA	Zhao, Man,et al."Diverse soil respiration responses to extreme precipitation patterns in arid and semiarid ecosystems".APPLIED SOIL ECOLOGY 163(2021).